Answer: 215.2
Explanation:
Since the mean of six numbers is 184.2, this means that their total sum will be:
= 184.2 × 6
= 1105.2
Since the mean of five of the numbers is 178, their total sum will be:
= 178 × 5
= 890
Therefore, the sixth number will be:
= 1105.2 - 890
= 215.2
The sixth number is 215.2